Physical VS Chemical!

Properties and Changes

Physical VS Chemical!

Properties and Changes

Physical Changes

A physical change means you are changing the looks, shape or size of a substance without changing its elements.

Example:

Carving wood (Why? Because the wood can now be a sculpture, but it is still wood)

Cutting paper (Why? Because the paper can be in more pieces, but it is still paper)

Cutting Paper

Carving Wood

Melting Candles

Cutting Paper

Carving Wood

Melting Candles

Chemical Changes

A chemical change means you are changing the substance of your item. A chemical change will also most likely change the looks and size, kind of like a physical change, but without keeping the same substance.

Example:

Burning a flammable item (Why? Because the item is now turned into ashes, not like regular)

Digesting Food (Why? Because for example, let's say you are eating an apple. When you chew the apple, it is still an apple! But when the apple goes through your stomach, it is not an apple anymore.)

Burning Flammable Items

Digesting food

Baking Food

Burning Flammable Items

Digesting food

Baking Food

Physical Property

Physical property is observing the characteristics of something without changing the substance.

Example:

Color

Size

Texture

Temperature

Smell

Taste

(Why all these? Because you are observing the items characteristics and ways, but you aren't adding another substance.)

Chemical Property

Observing an items characteristic by adding another substance. This works because the results you will see will react and you can find out why by seeing the multiple chemicals.

Examples:

Fire

Smoke

Explosion

Rust

(Why all these? Because you are observing the characteristic and seeing the results, then you will compare the to the substance.)